Question

When is tanφ negative?

(a) When inductive reactance is less than capacitive reactance

(b) When inductive reactance is greater than capacitive reactance

(c) When inductive reactance is equal to capacitive reactance

(d) When inductive reactance is zero

I had been asked this question in an international level competition.

I need to ask this question from Alternating Current in an RLC Circuit topic in section Single Phase Series Circuits of Basic Electrical Engineering

Answer 1

The correct option is (a) When inductive reactance is less than capacitive reactance

To explain I would say: tanφ is negative when inductive reactance is less than capacitive reactance because current will lead the voltage.